Automatically-controlled printing tabulator



Sept. 21 1926.

C. D. .LAKE

AUT OMAT I CALLY CONTROLLED PR I NT I N G TABULATOR Original Filed Ap'rl 30. 1921 13 Sheets-'Sheet l C. D. LAKE sept. 21, 1926.

r'i-l 30. 1921 13 Sheets-Sheet 2 Sept. 21 1926.

C. D. LAKE vAUTOlvIATICALLY CONTROLLED PRINTING TABULATOR 15 Sheets-Sheet 3 Original Filed April 30. 1921 l lill/lf :Pill

Sept. 2l 1926. 1,600,413 n C. D. LAKE AUTOMATICALLY CONTROLLED PRINTING TABULATOR Original Filed April 30, 1921 13 Sheets-Sheet 4 C. D. LAKE ept. 21 1926.

13 Sheets-Sheet 6 Sept. 21 1926. v 1,600,413

c. D. LAKE AUTOMATICALLY coNTRoLLED PRINTING TABULATOR original Filed April 5o, 1921 1:5 sheets-Sheet v 06u/L @n (37 /M/ PAVMML 4,0 Mmm sept. 21, 1926. 1,600,413

c. D. LAKE AUTOMATICALLY coNTRoLLED PRINTING TABULATOR originan Filed April so. 1921 1:5 sheets-sheet a am m ha, Arrommys Sept. 21 1926. 1,600,413

c. D. LAKE AUTOMATICALLY CONTROLLED PRINTING TABULATOR Original Filed April 30, 1921 13 Sheets-Sheet 9 MINIMUM In lll-limi Il llllllllv [Muff/MMM Sept. 21 1926. V1,600,413

C. D. LAKE AUTOMATICALLY CONTROLLED PRINTING TABULATOR Original Filed April Z50. 1921 13 Sheets-Sheet 10 Sept. 21 1926.

c. D. LAKE y AUTOMATICALLY CONTROLL-ED PRINTING TABULATOR v Original Filed April 30. 1921 13 Sheets-Sheet ll @am m /I/vw/ Mlm 4@ manners Sept. 21l 1926. 1,600,413

' c. D. LAKE AUTOMATICALLY CONTROLLED PRINTING TABULATOR Original Filed April 30. 1921 15 Sheets-Sheet l2 Sept. 21 1926.

c. D. VLAKE AUTOMATICALLY CONTROLLED PRINTING TABULATOR Original Filed April 50, 1921 13 'Sheets-Sheet ll5 ,67 www* y MQ Amm Patented Sept. 2l, 1%26.

UNITED sTATss 1,600,412 PATENT oFFicE.

CLAIR D.LAKE, OF BINGHAMTON, NEW YORK, ASSIGNOR TO THE TABULATING MA- CHINE COMPANY, OF ENDICOTT, NEW YORK, A CORPORATION 0F NEW JERSEY.

AUTOMATICALLY-CONTROLLED PRINTING TABULATOR.

Original application iled April 30, 1921,' Serial No. 465,868. Divided and this application led December This application is a division of my copending application Serial No. 465,868, filed April 30, 1921, and an improvement upon my Patent No. 1,379,268, dated May 24, 1921.

vice for a machine of this character which is adapted to automatically stop or otherwise modify the operation of the machine upon a changeof a control or group member.

Broadly, the provision of an automatic control device is not new with me, but heretofore such devices have, when applied to a Hollerith type tabulator, utilized two sets of brushes, one broad and the other narrow, which brushes cooperate and compare two successive cards. In the present invention the use of wide and narrow brushes is obviated' with the attendant necessity for careful timing of the controlling circuits. Furthermore the previous constructions have necessitated the employment of a compara tively large number of relays and in the present embodiment the number of these relays has been materially reduced and the general construction simplified. l p

A further object of the present invention resides in the provision of an automatic control device which is flexible so as to permit one or more card columns to be used for automatic controlling and further to provide a device of this character which may be cooperatively associated with a group indicating mechanism so that certain columns and counters may be used either for controlling and group indicating or for straight accumulating.

A further object of the present invention resides in the combination of the automatic control device withfresetting-devices and devices for restarting tabulating uponthe next Serial No. 520,271.

into action the printing devices to take aV total. Provision is also made for automatically restarting the tabulatorupon the completon of the taking of the printed total or tota s.

device for taking the total is full shown and described in the patent above reterred to, and in the present application recourse will be had principally t0 the circuit diagram to show the modifications which are necessary in my former machine to effect the automatic taking of totals and the automatic resumption of tabulating operation under the control of the auto control device.

Another object of the present invention is to provide means' for printing upon the rec-` ord sheet the group number when the group changes and when a total is taken under the' control 0f the auto control device. Provision is made for suppressing the printing of the group number except for the first listed item and when printing a total. If the machine is to be used for tabulating without listing, the group number may be printed for each group total.

Another object vof the present invention is the provision of a control device of such character that the control may be effective upon one or a pluralityof columns, in which the group will be indicated and printed as above, and in which other columns may be merely indicated and recorded without effecting the control over the stopping of the machine or of the automatic taking of a total.

Other objects of the invention reside in the provision of certain means which may be selectively operated to'cut in or out of operation the group indicator and printer, the auto control devices, :the automatic total taking devices, the automatic restart devices, and other elements of the system whereby an exceedingly flexible arrangement may be secured which will permit` various combina- The detail arrange-nient of the printing los tions of operations to be secured upon the same machine.

The accompanying drawings illustrate the complete control attachment and its method of o ration. v

F1 1 is a view in elev-ation of a Hollerith tabu ating machine showing the manner of attachingthe rinting device thereto.

Fig. 2 is a si e elevation of the feed mechanism of a tabulator which differs from the usual form of feed and is required for carrying out the present invention.

Fig. 3 is a central vertical section of the feed mechanism of the tabulator, on the line 3-3 of Fig. 4.

Fig. 4 is a rear view in elevation of the working parts within the case of the feed mechamsm.

Fig. 5 lis a front view in elevation of a portion of the feed device, a part of the exterior casing being removed.

Fig. 6 is aview in elevation of a portion of the gearing and parts of the feed mechanism, viewed from the opposite side yto Fig. 2. 1

Fig. 7 is a detail view of parts of the upper brush holder. f

Fi 8 is a sectional view of the same on the line 8-8 of Fig. 7. l H

Fig. 9 is a front view of the lower contact blocks.

lower card levers and associated parts shown Fig. 10 is a detail view of the upper and in Fig.' 3.

Fig. 11 is a viewv in elevation of an electromagnet and circuit controller forming part of the control unit or apparatus.

Fig. 12 is a sectional detail of a cam and circuit controllers, taken on the line 12--12 of Fig. 14.

Fi 13 is a front view of the parts shown in Flg. 11 taken on the line 13-13 of that ligure.

Fig. 14 is a plan view of the controlling magnets and associated parts of the controlling unit.

Fig. 15 is a detail of the latch mechanism associated with the control magnets.

Fig. 16 shows a mechanical release for the control magnet armatures.

Figs. 17 and 18 are end and side views of driving parts of the controlling unit, tabulator and attached parts.

Fig. 19 is a view in e evation of a clutchcontrolling magnet and its associated parts.

Fig. 20 1s a top plan view of the same.

Fig. 21 is a sectional view of the circuitcontroller operatedby the clutch magnet.

-Figs. 22 and '22* together Yconstitute the wiring dia am of the apparatus shown in the precedin figures.

So far as 1t is possible to do so without confusion, I have used the same numerals to designate corresponding parts in all of the above-described figures.

To accomplish the objects of this inven- I add to the tabulator a control mechation,

nism or unit, and add to the cardfeed mech- 'the usual brushes always employed, I employ an upper set of brushes whose function is to cooperate with the lower set to effect a comparison of two cards and bring about the-desired control thereby. The two sets of brushes are at 'such distance apart that they will register with corresponding hole positions on two consecutive cards as they pass through the machine. Under this arrangement, if both sets of brushes make a simultaneous contact with control holes of the same numerical value, nothing results to interfere with the normal running of the machine. But if the control or group number changes on any card and is not the same on the upper as on the lower card then the control circuit is affected and the tabulating operation interrupted.-

I will first describe such mechanical devices as I have devised and which are necessary `for the purpose of effecting such control, and afterwards more fully set foi-th the operationin connection with the circuit diagram figures.

In Fig..2 which shows the `feed mechanism, the lower gear wheels 1 are a part of' the train of gears commonly used in tabulators for feeding the cards. In this device I use the driving gear wheel 2 in addition to its usual function, to operate the upper set of'whfels 3. The connecting rod 4, from wheels 3, is similar to that ordinarily used in tabulators for drawing the cards singly from a pack into the machine where they are engaged by the feed rolls.

There are two sets of brushes, 5 the upper and 6 the lower. The upper brushes 5 are carried by metal plates 7, Fig. 8, secured to an insulating base plate 8, each brush being insulated from all the others. The lower brushes 6 are carried by a metal bar 9 (Fig. 3) which is common to all of them, and both upper and lower brushes when a perforation passes under them, make contact with corresponding individual, separate blocks 10 and 11 respectively, each of said blocks being insulated from any other blockl The cards are drawn down tothe upper rolls 12,

and are lpassedrby these and similar pairs of rolls elow them through the chute 13 for the upper. brushes and then through the chute 14 for" the lower brushes. In all other respects than those noted the construction and arrangement of the device is the same as in the ordinary tabulator with the single exception, perhaps, that an upper lever 15 extends across the upper chute in the path of the cards which, when a card passes, shifts a pin 16 that brings together two contacts 17, while a second or lower card lever 18 is similarly placed in the lower chute that, when a card is passing, closes two sets of contacts 19 and 20.

The feed mechanism is driven by a belt and pulley 21, Fig. 4, to which pulley 1s fixed a ratchet wheel 22, shown also 1n F1gs. 2 and 19. On the drive shaft 93 is fixed a clutch arm or bar 25, and loose upon this arm is a second arm 23. Pins 97 1n bar 25 enter enlarged holes, not shown, in the bar 23 and limit its sidewise play. A pin -24 is set in clutch bar 23 and is to knock out and hold the pawl 26 free from engagement with the ratchet 22. This pawl is pivoted to bar 25 and when engaging with the ratchet 22, it carries the two bars 23 and 25 around with the driving pulley. t

On the completion of the circuit tothe l'tabulator motor, in a manner to be hereafter explained, 'the current passes through and energizes a clutch magnet 27, Flg. 19, causing it to attract the armature 89 thereby imparting motion to the clutch lever'9() to which said armature is fixed, and drawing it away Vfrom engagement with the clutch bars 23 and 25.

When the energized magnet 27 has, through the instrumentality of clutch lever 90, released the bars 23 and 25, the pawl 26 is pulled into engagement with the ratchet 22 by its springs 99, and this causes the clutch bar 23 to travel around slightly in advance of the bar 25.

During each cycle a pin 98, Fig. 4, se-

cured to the gear wheel 1. comes into engagement with a knock offv lever 94, Fig. 21, which is secured to shaft 91. As clutch lever 90 is also pinned to this shaft, it tends to knock ofi the armature 89, and at such time the clutch magnet shunt contacts, as will be more fully understood by subsequent description, are made in order to break the magnetism of the said magnet. However, if the motor circuit has not been broken, the clutch magnet will again be energized, when these contacts are made again. and thus prevent the stopping of the machine.

As will also be more fully set forth, should the motor circuit be broken by the change of a control number in a card, by the depression of the stop key or by the last card of a group, the clutch magnet 27 will not be energized, and after the knocking ofi' by the pin 98 of its armature the latter will not return, and the end of the clutch lever 90 will be in a position to engage the ends of the clutch bars 23'and 25. yThis engagement is so timed as to bring the machine to a tion.

As explained above, the clutch bar 23 in its running position is slightly in advanceof the bar 25. so that when the end of the clutch lever 90 rises into its path, the arm positive stop in a predetermined posi- 25 strikes first the pin 24, working against `the tail of the pawl 26, and pulls the latter out from engagement with the ratchet 22 and allows the over-run of the motor to be taken up by the now loose pulley wheel. Latch 92 drops in behind arm 25 totake the rebound of the machine. 'The shaft 91 is mounted in pivoted bearing plates 100 and is held against the magnet box by the spring 101. This provides for the overthrow or momentum of the machine being cushioned. `Actuated by the knock of lever 94 is a plunger 95 which .operates a pair of contacts 96. When magnet 27 is energized, these contacts break the circuit to the reset mechanism and prevent its starting during the tabulating cycle. When the tabulator stops, however, and the clutch is latched up these contacts are made and the machine may be reset either manually or automatically. The operations of total taking, resetting, tnd restarting the tabulator will be set forth ater.

The control unit which I have illustrated herein is arbitrarily designed for the control of eight columns of a tabulator card. This number may be greater or less if so desired. It is enclosed in a suitable box or casing 28 and secured in any convenient position and manner to the frame of the tabulator, preferably as shown in Fig. 1. The casing contains, in this case, eight column control magnets 29, Figs. 11, 14, 22 and 22a, each having an armature 30 that is connected to a pivoted overlapping latch lever 31 or 32. When a magnet is energized and attracts it-s armature the latch lever releases a spring-actuated lever 33, pivoted at 34, which falls away or to the right from a contact 35, normally in engagement with a contact pin 36 carried by a spring-actuated arm 37. This results in the separation of the contacts 35 and 36 and permits the arm 37 to close contacts 38 which are normally open.

In the control unit is a shaft 39 which receives motion by gears from the counter drive shaft 40 (see Fig. 18) and this shaft carries cams 41 (Fig. 11) having high points which at a given instant in each cycle engage the cam ends of levers 33 and close the contacts 35 and 36, and relatch said levers `with the latch levers 31 and 32. This operation takes place once in each cycle.

On the same shaft 39 is a cam 42 which, towards the end of each cycle, engages the end of a lever 43 pivoted at 44, the lower end 43 of which carries a cross rod or bail 43b which in its movement knocks oil' the attracted armatures 30 by striking the over lapping levers 31 and 32 and insures the reengagement of these levers 31y and 32 with the lever 33.

Passing now to Figs. 12 and 14: As stated above, there are eight column or control magnets 29, and in addition there is a group indicator magnet 45, which operates one of the latch levers 32 to release a lever 46 fast on shaft 34, and operating a bail 47 which controls all of aset of ten contacts 48, which are known as group indicator contacts. During the reset of the machine the shaft 34 is rotated through a short arc by means of an eccentric cam 49 (Fig. 18) on the reset to zero shaft 50 of the tabulator which is connected by linkage 87-88 with a iXed arm 54 which-rocks the shaft 34.r This movement of the shaft rocks the. lever 46 (Fig. 12) and permits it to relatch with theI latch lever 32, and at the same time to close contacts 48. The same movement rocks a. lever 55 by the engagement therewith of a pin 56, and therebyknocks off the armature 30 of the group indicator magnet (see Fig. 11).

In the diagram Fig. 22 are shown four cam contact devices 61, 62, 63 and 64. The cams of these contact devices are fast on the shaft 39 and are insulated from it and from each other.

In further explanation of the invention, let it be assumed that a sorted group of cards, or two or more groups of different cards, are passed through the tabulator `whichis to record or display the totals of the values represented by item holes punched in these cards. Each group of cards is distinguished by control holes punched in one, two or according to the provision made in this particular machine, eight different columns at the same time. The cards are placed in the hopper 65 and the tabulating lmachine started in operation in the usual manner by depressing start key 570.

Referring now to the diagram Figs. 22 and 22a, depression of the tabulator start key 57 0 closes the circuit from the line through tabulating motor T M, clutch magnet 27. motor relay 80, start key 570, motor control relay contacts 77, through cam contact devices 305 now closed, through cam contact devices 129, through contacts 550, to the other side of the line.. If a listing operation is to be performed, the same' circuit is closed as before, with the' exception of the fact that current flows from cam contacts 129 through the contacts 520 and 540, to the other side of the line, which insure the machine being driven at the lower listing speed, as in my prior patent previously referred to.

yIt may be here explained that the cam contact devices 61 to 64, inclusive, are all driven by a shaftl 39 which lis driven in unison with the tabulator. Cam contact devices 305 are driven by a shaft 2,20 which is shown in Fig. 4. This shaft is driven in unison with the tabulator card feeding devices as shown in Fig. 2, and corresponds with the identical shaft in my previous patent.

The cam contact devices 129 are driven by -a shaft 900 in the printing attachment. Durf ing normal tabulating operations this shaft is stationary and isonly set in operation upon the taking of totals and the resetting o the tabulator counters to zero, as in my' In the automatic control unit as shownv there are eight group indicator contacts 48 and two extra contacts 48'* and 48", one, 48", for setting upthe control relay 71 and the other for -completing the circuit when using the counters for plain indicating without controlling- The rst of the last two contacts mentioned above, when all the contacts are closed, energizes the relay 71, which is held closed by the action of cam-controlled contacts 64, to behereinafter further referred to. Y

The feed mechanism is started either automatically or by the operation of the tabulator start key 570 in the manner previously explained, and the cards begin to travel through the machine, as the clutch magnet 27 connects the feed mechanism with the drive. As the cards pass one by one down through the chutes 13 and 14 nothing happens until the first card passes under the lower brushes 6, and thereby closes contacts 19 and 20, the contacts 17 having already been closed by the upper card lever 15.

Assuming that only cards which are all in the samegroup are passing through the machine, the control'numbered holes pass under both upper and lower brushes at the same instant of time. VThis permits a circuit to be completed from any given lower brush 6, Figs. 22 and 22a, to contact block 11 and thence by wire 69 to the contact block 10 of the corresponding upper brush, and` from thence to the brush 5 ltself. From the upper brush the circuit is continued to the plug board and for convenience of reference, theparticular plug holes connected together in advance, are both marked 70 in the diagram,-

one plug connection being used for each column, and as many used as desired. This permits the current to pass through one of l the column control magnets 29 and back to the source. The control magnet thus energized, breaks contacts 35 and 36 for the purpose of taking the arc from the brushes, and

makes' contacts 38 (seeFig. 11) which complete a part of the shunt containing the control relay 71. The same result follows from the passage of the brushes over al1-the other holes in the control columns which may have been plugged in, i. e., 70-70 etc., and the shunt circuit is thereby completed. During the card cycle cam' contacts 64 are momentarily separated but this does not affect the `relay 71 because the circuit 73 through the contacts 38 is closed, otherwise the `circuit through the rela 'would thus be broken. The plug 303 can lie plugged into any of the plug sockets 30410 out out of action one or morecolumn control circuits when less than the full number of columns are being. used for controlling.

Near the end of the passage of the first card under the lower brushes, cam controlled contacts A630 are closed and this vdirects a current through the group indicator magnet 45 and this releases the lever 46 and permits the bail' 47 to fall awa from-and open all of the contacts 48,\an so long as no interruption to the running of the machine occurs, these contacts'remain open. .lt may here be pointed out that the group 1ndicator contacts 48 are plugged in between the oints 74 and 75, that is, between the brus plugs and the counters for preventing the establishment of circuits after the first card has passed through, and after/.the first number has been set up upon the counter.

From the above it will appear that so long as the successive cards contain corresponding control holes, the necessary circuits are maintained complete and the normal operation of the machine continues.

Now let it be assumed that the last card of a group has passed the upper brushes.

When this card comes under the lower brushes the first card-of the next group is under the upper brushes, but this card having one orl more control holes of a different numerical value, which do not correspond to the control holes in the last card of the first group under consideration, the circuit is therefore interrupted between the upper contact brush 5 and its block 10, and this results in the breaking of the circuit 69 and the failure of the magnets 29 to'become energized. This leaves contacts 38 open and interrupts the shunt circuit 73, which, on the opening of the contacts 64, de-energizes the relay magnet 71 and breaks the circuit of the motor relay 7 6/which allows contacts 77 to separate and breaks the circuit at that point. These contacts 77 are shunted by the circuits 78 through cam contacts 961 whe-n tabulating, or cam contacts 79 when listing, which break towards the end of the cycle, (le-energizing the motor relay7 80 and the tabulator clutch magnet 27. This results in the positive stoppage of the machine, as will now be understood from the description of Fig. 2.

It yis manifest from the above description that the presence of a misplaced card in any group of cards, which has a control hole that docs not correspond with that or those in the other cards will result in the same operation, and will stop the machine.

The foregoing description has explained the method of automatically stop ing the tabulating operation by means of t e automatic control devices. It will now be assumed .that it is desired tomanually or automatically take a total. If a total is to be taken manually, switch 106 is opened as shown and reset key 580 is depressed. This allows current to flow from source 590 through contacts 550 when tabulating, or 540520 when listing, therethrough through contacts 129, now closed thence through conductors tothe reset key 580, through Lreset key 580, contacts 100", now closed, clutch magnet controlled contacts 96, reset magnet 620, reset motor 600 to the other side of line and back to source. It may be here explained that cam contacts 100, 105 and 630 are disposed upon a shaft which is driven by the tabulator concurrently with the rotation of shafts 39 anl 220. The rotation of the reset motor 600 effects the printing of the total and the resetting-of such counters as are selected to be reset, in the manner explained inmy patent heretofore referred to. After initiating a'totaling and reset operation by reset key 580, the liow of current through the reset motor is taken over by means of a relay arm controlled by magnet 620 which shunts out reset key 580. `After the totaling and resetting operation is initiated, magnet 620 is short-circuited. Control of the printing and reset motor istaken over by contacts 740, which are mounted on shaft 900 and driven during the printing and resetting operation.` These contacts at the end of the printing and resetting cycle break the circuit to motor 600 and stop further rotation thereof. The means for first taking a total and thereafter resetting is controlled by the magnet 620, in the manner explained in my previous patent. In addition, it may be here explained that the contacts 96 prevent the operating of printing and resetting when the tabulating motor (T M) is running and has energized clutch magnet 27 which.

opens contacts 96.

If it is desired to take a total auto-matically, switch 106 is closed. Then just before the tabulator comes to rest after its control by the auto control device, cam contacts 105 will be closed and these contacts will ,initiate the total printing and resetting operation which will then be completed in the manner heretofore described. It may be explained that the circuit to switch 106 extends to the contacts controlled by stop key 560. Therefore, if this emergency stop key is opened for any purpose, the machine will not automatically take a total until the stop key-is again closed.

A total having been taken, either automatically or manually, the restarting of the tabulator upon the next card group may be effected either automatically or manuautomatically start up and tabulate, a total switch 130 will have n This switch establishes a new starting c1r cuit traced as follows: 'From source 590 through tabulating motor (T M), clutch magnet 27, motor relay 80 switch 130, cam contacts128, which are closed just at the end of the printing and resetting operat1on by cam 154, around motor relay 80 through lower card lever contacts 20 (now closed since there are cards in the machine), through motor control relay contacts 77 (now closed), thence either through cam contacts 305 or stop key control contacts through conductors to cam contacts 129 (now closed) through one or the other of contacts 550 or 520-540 to the other side of the line and back to source. This circuit initiates the tabulating cycle automatically. The tabulator then continues running by virtue of the closure of the contacts of motor relay 80 until stopped by the automatic control devices at the end of the next card oup in the manner heretofore explained. The tablulator is then brought to rest and additional totals may be taken, automatically or manually, the counters reset, and the tabulator restarted again, automatically or manually, as desired.

It will be assumed that a card group has been tabulated and that there are no additional cards in the machine. Provision must be made ,for interrupting the automatic tabulator starting circuit'. Under these conditions the lower card lever control contacts 20 will be interrupted upon the brus es and therefore will interrupt the automatic starting circuit previously traced and prevent the automatic restarting of the tabulator. It will also be appreciated that when there is no additional card group in the machine upon which the tabula-tor can start up, that provision must be made to pass the last card of the old group through the machine, since the items must be taken off this card, tabulated, listed, if desired, and a total taken. After the last card of the group passes the upper brushes, the 'control circuit previously explained `as flowing through these brushes is made on all contact blocks and all upper brushes 5. This, in effect, energizes all control circuits plugged in, thereby alowing the card feed to continue and remain uninterrupted until the last card has passed the lower brushes 6 and lower card lever 18, thereby` opening the contacts 19-20 controlled by this lever.

en previously closed.

assage of the ,last card past the lower.

moans' Opening of contacts 19 o ns the circuits to closed for an extra card cycle after passing the lower brushes,f thereby permitting the card feed to continue during that cyc irres ective of the opening of cam contacts 64.

n this operationit is necear to insure that the machine stop exactly at t e position well known in the art as the D stop position, i. e. the normal home position of the parts of the machine, after the last card has passed out be ond the lower card lever 18. To do this t e holding circuit 307 is provided which extends 'from cam contacts 154---306 to cam contacts 62 thence to relay contacts 77, andthence to the other'side of the line through cam contacts 305, cam contacts 129 and contacts 550 which were traced. This holding circuit maintains the tabulator in operation until just before the D position is reached when the holding circuit will be broken by contacts 77 by the de-energization of relay magnet 76 which is effected bythe breaking of contacts 64, which contacts are in the automatic control'circuit. Just prior L to the breaking of the contacts 7 7, another circuit will maintain the tabulator motor in operation. This circuit is marked 78 and allows current to lflow through motor T M clutch magnet 27, motor relay 80, through 78 and one or the other of cam contacts 961 or 79, the former being used in straight tabulating and the latter in listing, thence through contacts 129 and through one or the other of contacts 520-540 or 550 to the other side of the line. Just before the D position is reached either cam contacts 961 or 79 new vtabulating cycle, since the lower card lever contacts 20 are open due to theabsence of cards and these open contacts thereby interrupt the entire circuit to the auto start cam contacts 128 thus preventing restarting of the tabulator automatically.

The purpose of the cam contacts 61 is to short circuit the clutch magnet 27 momentarily. at the time the armature 89 is being knocked away from said magnet 27 mechanically by means of the pin 98, as previously explained. This insures aw positive stopping of the machine and disengagement of the` clutch.

Cam contacts 63 serve to control the countin of cards which pass through the machine. These. cards m be counted on 1n desired counter, a suita le plu connectlon being connected in at 308 whic vextends to any selected counter magnet plug socket -74. Cumcontacts 305 operate in conJunction with stopkey 560 to insure that the machine will come to a stop at the D posltion when circuit connections are interrupted by the opening of the stop key 560 control contacts. y A

Cam contactv devices 978 in ,connection with lower card lever contacts 19 serve to control the supply of current to the common late '92 which is connected to the lower rushes 6. The purpose of this circuit and controlling contacts is to allow current to iiow during the passage of a card past the brushes and tointerrupt the flow o f current at the intervals between the cards so that erroneous additions and printing will not be 'eii'ected at such times.

The cam contacts 129 serve to open up the tabulator circuit during the totaling and resetting operations so that the tabulator cannot be restarted upon tabulating operations until total taking and resetting is substantially completed.

Cam contacts 100a in conjunction with contacts 96 controlled by clutch magnet-.27 sreve to prevent the taking of a total -or the resetting of the tabulator counters vduring tabulating operations. These devices are similar tocorresponding devices in my previous patent. l l

The cam contacts 630 serve to ycontrol .the supply of current to the group indicator magnet 45 at the proper time of the cycle. The purpose of these contacts is to make the circuit to the group indicator magnet after the first card of a group has passed and has set up the proper indication upon they counter wheels and also eii'ected the proper type setting inthe printing or listing attachment.

The cam contacts 125 serve to control the ilow of current at the proper time to the circuits 221 which lead to the total taking contacts 850 and 860, the former being controlled by cams 840 in the manner described in my previous patent. In circuit with contacts 860 are the printing and listing magnets 380. Contacts 860 when in cooperation with 860a are used for listing and when in cooperation with 850 are used for total taking as-inmy previous patent.

To selectively control the printing of totals from the various counters, three switches, 108, 107 and 139, are provided. By the opening of these switches the printing circuits corresponding to one or the other or all of the counters may b e cut out of the operation thereby preventing the taking of a printed total. If it is desired to cut out all the total printing magnets simultaneously, a switch 309 is opened thereby interstraight tabulating without, regard to automatic control when groups change.

Switches 310 and, 311 when thrown to closed position, as shown, serve to permit straight tabulating, when switch 302 is thrown to closed position to cut out the automatic control devices. When switch`302 is opened, as shown, and switches 310 and 311 are closed, as shown, controlling will be secured on both counters A and B so far as thel controlling columns are connected by plug connections. This is .the position used when a counter is split to tabulate on certain wheels and control on other wheels or columns. If all of the wheels for the first counter are to be used for controlling, switch 310 may be either in the position shown or thrown to connect pole 312. In either of these positions the group number or characters will be indicated and printed when the first card passes through, when listing, andv repeated when-a total is taken. If, however,

,the counter marked A is to be split, using certain columns for controlling and other columns for indicating, it is necessary to throw the switch 310 to connect with pole 312.y In this'case, the columns of the l counter which are connected and print the group number or the irst passing card when listing, repeat the same when totaling and on the columns which are not connected for controlling, a similar group indication and printed record will be made. These latter columns, however, will have no effect in stopping themachine when groups change.

Switch 311 is used'in asimilar manner on the second counter marked 13.

In the drawin lfs I have shown two counters A and B and a third C, the former are to be used for group indicating and control' ling, as previously explained. However,`

only eight of the sixteen columns in these two counters can be used for controlling purposes at any one time.

In taking a total with either or both of switches 311 and 310 thrown over into contact with poles 313 or 312 it is necessaryto provide a path for the current flowing through the printing magnets, otherwise the group 

